Ventilator for stove-pipes



{No Model.)

J. P. KRABILLv VENTILATOR FOR STOVE PIPES.

No. 313,826. Patented Mar. 10, 1885.

WITNESSES lUNTTao STaTes PATENT Oriana,

-JOHN P. KRABILL, OF SHAVVTOVVN, OHIO.

VENTILATOR FOR STOVE-PlPES.

SPECIFICATION forming part of Letters Patent No. 313,826, dated March 10, 1885.

Application filed October 23, 1884.

(No model.)

the art to which it appertains to make and use the same.

My invention has reference to ventilating attachments for stoves; and it consists in the improvements hereinafter described,whereby a stove-pipe section is so constructed and arranged that when in position it will serve as a ventilator to lead the cooking-odors to the chimney, and likewise purify the atmosphere of the room or a part of it.

In the accompanying drawings, forming a part of this specification, Figure 1 is a side elevation of a stove and stove-pipe, my improvement being applied to the latter; and Fig. 2 is a detail sectional view of a part of the pipe.

A represents an ordinary stove,wl1ich communicates with the chimney or flue by means of a suitable pipe, B. The said pipe B is provided at oneportion with a. su pplemental receptacle, G, which is closed by a bottom, a, and gradually contracts toward its top, as shown most clearly in Fig. 2. The said receptacle presents interior-1y a vertical chamber, b,which communicates at its top with the interior of the pipe B through an opening, 0.

IVithin the chamber 7) is located a vertical tube, D, which gradually contracts toward its top, as shown in Fig. 2, and is secured at its lower end so as to cover an opening in the bottom a of the receptacle 0. The lower end of the contracted tube D is provided with a flaring mouthpiece, d, which depends from the bottom a of the receptacle, as shown in Fig. 2.

In operation the draft in the pipe B will createan intersecting draft in the compartment 0, and from said compartment through the aperture 0 into the pipe B. Consequently the vacuum or partial vacuum created in the compartment 0 will cause a current of air to pass from the external atmosphere through the funnel'shaped mouth and contracted tube D to the pipe B by way of the opening 0. It will therefore be apparent that the position of the funnel shaped mouth piece d is such p that cooking gases and vapors immediately over the top of the stove will be drawn di-- rectly into the funnel-shaped mouth-piece and expelled into the pipe B, as previously described.

By contracting the tube D, as explained, the draft passing through the same is gradually throttled, thereby securing a more intense current of air than otherwise.

The oflice of the chamber 0 is not only to act as a support for the tube D, but to permit the initial vacuum for starting the current of air through the pipe D, and, furthermore, to receive and contain particles of dust that may be forced by back-draft through the aperture 0.

I am aware that previous to my invention it has been proposed to construct ventilator by providing a square compartment communieating with a room with a vertical pipe surrounded by a protectingcylinder, and that a gas-jet was located in said compartment to generate by its heat an ascending current of air, a small pipe establishing a discharge-outlet for the airinthe upper portion of the room by direct connection with the upper part of the vertical pipe.

I am further aware that it has been proposed to lead a tube into the stove-pipe, the external portion of said tube being provided with a depending flaring mouth-piece. My invention, however, will be readily distinguished from such constructions in that the interior of the pipe section communicates as well with the interior of thesupporting-chanr ber as with the ventilator-tube, thereby enabling the air in said chamber to primarily be withdrawn, and thus afford an initial vacuum for generating the current through the contracted tube.

I claim- 1. The combination, in a'stove-pipe section, of an aperture formed therein, a supplemental receptacle arranged on said section and communicating through the openingnvith the interior of the section, and a tube located in said receptacle and forming a communication through said chamber for the atmosphere to the interior of the pipe-section, substantially as set forth. 1=

ICO

2. The combination, in a stove-pipe section mosphere through a funnel-shaped mouthhaving an aperture, 0, formed therein, of a repiece, d, substantially as set forth. :0

ceptacle secured on said section and contracted In testimony whereof I affix my signature in toward its upper end, where it communicates presence of two witnesses.

5 with the pipe-section through said aperture, JOHN P. KRABILL.

and a vertical tube, D, located in said recep- WVitnesses: tacle and contracted toward its upper end, and T. H. BUSHONG,

communicating at its lower end with the at- E. L. BUsHoNG. 

